计算lg25+lg50+lg2*lg500+(lg2)^2
问题描述:
计算lg25+lg50+lg2*lg500+(lg2)^2
答
=2lg5+1+lg5+(1-lg5)*(2+lg5)+(1-lg5)^2
=3lg5+1+2+lg5-2lg5-(lg5)^2+1-2lg5+(lg5)^2
=4